Returns

This indicates that only state was posted to the view without form field
values. Actually meaning that the view is supposed to the posted state and so it
should be returned. Used only on ajax requests.

Parameters

Register child with a view under given name. The name is supposed to be
unique in context of the child's parent object. If the name changes during
lifecycle of the view just register the same object again with a new name, do
not unregister it.